EP3591759B1 - Antenne de terminal mobile et terminal mobile - Google Patents

Antenne de terminal mobile et terminal mobile Download PDF

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Publication number
EP3591759B1
EP3591759B1 EP17902339.5A EP17902339A EP3591759B1 EP 3591759 B1 EP3591759 B1 EP 3591759B1 EP 17902339 A EP17902339 A EP 17902339A EP 3591759 B1 EP3591759 B1 EP 3591759B1
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EP
European Patent Office
Prior art keywords
metal section
conductor
metal
antenna
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17902339.5A
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German (de)
English (en)
Other versions
EP3591759A1 (fr
EP3591759A4 (fr
Inventor
Lijun YING
Hanyang Wang
Liang Xue
Jiaqing YOU
Chien-Ming Lee
Xiaoli Yang
Dong Yu
Lei Wang
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Publication date
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Publication of EP3591759A1 publication Critical patent/EP3591759A1/fr
Publication of EP3591759A4 publication Critical patent/EP3591759A4/fr
Application granted granted Critical
Publication of EP3591759B1 publication Critical patent/EP3591759B1/fr
Active legal-status Critical Current
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/2258—Supports; Mounting means by structural association with other equipment or articles used with computer equipment
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths
    • H01Q5/371—Branching current paths
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/378—Combination of fed elements with parasitic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
    • H01Q9/045—Substantially flat resonant element parallel to ground plane, e.g. patch antenna with particular feeding means

Definitions

  • This application relates to the field of communications technologies, and in particular, to an antenna of a mobile terminal and a mobile terminal.
  • FIG. 1 A principle of a conventional T-type antenna is shown in FIG. 1 . It can be learned from FIG. 1 that the T-type antenna uses a metal bezel as a radiating element of the antenna, and at least two slots are disposed in the metal bezel. The slots divide the metal bezel into three metal sections, and the three metal sections are marked as a first metal section 1, a second metal section 2, and a third metal section 3, respectively. The second metal section 2 is connected to a feed point 4. During specific connection, the feed point 4 is connected to the second metal section 2 by using a matching network. A current of the T-type antenna is distributed along a metal bezel of a mobile terminal. Refer to FIG. 2a to FIG. 2d . FIG.
  • FIG. 2a is a schematic diagram of distribution of a maximum electric-field value in a quarter wavelength modal of a long stub running from a feed to a left slot
  • FIG. 2b is a schematic diagram of distribution of a maximum electric-field value in one wavelength modal of an entire stub, namely, a second metal section 2
  • FIG. 2c is a schematic diagram of distribution of a maximum electric-field value in a quarter wavelength modal of a short stub running from a feed to a right slot
  • FIG. 2d is a schematic diagram of distribution of a maximum electric-field value in a three-quarter wavelength modal of a long stub running from a feed to a left slot.
  • a circle represents a maximum electric field point in a corresponding modal.
  • the maximum electric field point in each modal is usually at a slot of the metal bezel.
  • antenna load is relatively large, and a radiating hole is small, causing low bandwidth and radiating efficiency. This is even more serious in a case of a large screen-to-body ratio and small headroom.
  • an antenna slot is usually disposed close to an edge of the metal bezel to implement low-frequency resonance. As a result, a large electric-field area is relatively close to a hand, and impact of the hand on the antenna is relatively large.
  • An antenna of a mobile terminal according to independent claim 1 is provided.
  • Dependent claims provide preferred embodiments and a corresponding terminal.
  • Embodiments of this application provide an antenna of a mobile terminal and a mobile terminal, to improve performance of the antenna of the mobile terminal.
  • an antenna of a mobile terminal where the mobile terminal has a metal bezel, at least two slots are disposed in the metal bezel, and the two slots divide the metal bezel into a first metal section, a second metal section having a length direction, and a third metal section;
  • lengths of the first conductor and the second conductor are changed, so that the electrical length path of the current from the feed point to the second metal section is not equal to the electrical length path of the current from the ground point to the second metal section, and a maximum electric field point in each modal is far away from a slot of the metal bezel, thereby reducing electric-field load in the slot and impact of a hand on the electric field in the modal, and improving performance of the antenna.
  • the feed point is connected to the first conductor by using the matching network.
  • the matching network may include an electric control switch, a variable capacitor, a capacitor, and an inductor that are connected in parallel or in series.
  • the feed point and the ground point may be respectively located on two sides of a first central line, or the feed point and the ground point may be located on one side of a central line, and the first central line is a central line, perpendicular to the length direction of the second metal section, among central lines of the second metal section.
  • a adjusting circuit located between the ground point and the feeder is further included, and the adjusting circuit includes a plurality of parallel branches, an inductor or a capacitor is disposed on each branch, and each branch is grounded; and the second metal section is selectively connected to one branch of the adjusting circuit.
  • An effective electrical length of the antenna may be changed by disposing the adjusting circuit, to tune a resonance frequency of the antenna.
  • one switch is disposed on each branch, or a single-pole multi-throw switch is used to implement a connection between the ground point and one branch.
  • an inductor and a capacitor that are connected in series are disposed on at least one branch.
  • An effective electrical length of the antenna may be changed by changing a value of the inductor or the capacitor, to tune a resonance frequency of the antenna.
  • a adjusting circuit is disposed in the second conductor, the adjusting circuit includes a plurality of parallel branches, an inductor is disposed on each branch, and each branch is connected to the ground point; and the second metal section is selectively connected to one branch of the adjusting circuit.
  • An effective electrical length of the antenna may be changed by disposing the adjusting circuit, to tune a resonance frequency of the antenna.
  • one switch is disposed on each branch, or a single-pole multi-throw switch is used to implement a connection between the ground point and one branch.
  • an inductor and a capacitor that are connected in series are disposed on at least one branch.
  • An effective electrical length of the antenna may be changed by changing a value of the inductor or the capacitor, to tune a resonance frequency of the antenna.
  • the antenna further includes one or two parasitic elements, and the parasitic elements may include the first metal section or the third metal section that is grounded. A resonance frequency of the parasitic element may be tuned by the ground point.
  • the parasitic element is the first metal section, or the third metal section, or the first metal section and a metal patch disposed at a slot endpoint of the first metal section, or the third metal section and a metal patch disposed on a slot endpoint of the third metal section.
  • the metal patch is a flexible circuit board, a metal conductive plate, a laser layer, or a thin-layer conductor.
  • the third conductor is a flexible circuit board, a metal conductive plate, a laser layer, or a thin-layer conductor.
  • a mobile terminal is provided, where the mobile terminal includes a metal bezel, at least two slots are disposed in the metal bezel, and the two slots divide the metal bezel into a first metal section, a second metal section, and a third metal section that are insulated from each other; and the mobile terminal further includes the antenna according to any one of the foregoing implementation solutions.
  • lengths of the first conductor and the second conductor are changed, so that the electrical length path of the current from the feed point to the second metal section is not equal to the electrical length path of the current from the ground point to the second metal section, and a maximum electric field point in each modal is far away from a slot of the metal bezel, thereby reducing electric-field load in the slot and impact of a hand on the electric field in the modal, and improving performance of the antenna.
  • the mobile terminal may be a common mobile terminal device, such as a mobile phone or a tablet computer.
  • the mobile terminal device has a metal bezel, and at least two slots are disposed in the metal bezel, thereby dividing the metal bezel into a plurality of metal sections that are insulated from each other.
  • two slots are disposed in a metal bezel, and the two slots divide the metal bezel into a first metal section 50, a second metal section 22, and a third metal section 60.
  • the antenna provided in the embodiments includes a radiating element 20, a matching network 40, a feed point 10, and a ground point 30.
  • One end of the radiating element 20 is connected to the feed point 10 by using the matching network, and the other end is connected to the ground point 30.
  • the radiating element 20 includes three parts: the second metal section 22, a first conductor 21, and a second conductor 23.
  • the first conductor 21 and the second conductor 23 are respectively connected to two ends of the second metal section 22.
  • the first conductor 21 is connected to one end of the second metal section 22, and the second conductor 23 is connected to the other end of the second metal section 22.
  • the end of the second metal section 22 indicates an end where the second metal section 22 is close to a slot, and the end is a metal section with a specific length (such as less than 5 mm).
  • the first conductor 21 and the second conductor 23 may be connected to any position of the metal section.
  • a connection point between the first conductor 21 and the second metal section 22 is a feed contact point 80
  • a connection point between the second conductor 23 and the second metal section 22 is a ground contact point 90.
  • a vertical distance d between the feed point 10 and the ground point 30 is less than a vertical distance D between the feed contact point 80 and the ground contact point 90.
  • the vertical distance d between the feed point 10 and the ground point 30 is far less than the vertical distance D between the feed contact point 80 and the ground contact point 90.
  • a ratio between d and D is between 1/5 and 1/2. It should be understood that the ratio is only used for describing a great difference between d and D, instead of a direct correspondence.
  • a formed antenna may be applied to different frequency bands, and performance of the antenna is further improved.
  • the feed point 10 and the ground point 30 are located on a same side of the second metal section 22, and the first conductor 21, the second conductor 23, and the second metal section 22 form a loop with an opening, thereby forming a loop antenna.
  • an electrical length path (a length of a path through which an electric charge flows from one point to another point) from the feed point 10 to the second metal section 22 is different from an electrical length path from the ground point 30 to the second metal section 22.
  • an electrical length path of a current from the feed point 10 to the second metal section 22 is not equal to an electrical length path of a current from the ground point 30 to the second metal section 22.
  • FIG. 2a to FIG. 2d are schematic diagrams of distribution of a maximum electric field of a conventional T-type antenna.
  • FIG. 2a is a schematic diagram of distribution of a maximum electric-field value in a quarter wavelength modal of a long stub
  • FIG. 2b is a schematic diagram of distribution of a maximum electric-field value in one wavelength modal of an entire stub
  • FIG. 2c is a schematic diagram of distribution of a maximum electric-field value in a quarter wavelength modal of a short stub
  • FIG. 2d is a schematic diagram of distribution of a maximum electric-field value in a three-quarter wavelength modal of a long stub. It can be learned from FIG. 2a, FIG. 2b, FIG. 2c , and FIG.
  • the electrical length paths from the feed point 10 to the second metal section 22 and from the ground point 30 to the second metal section 22 are changed, so that a maximum electric field point in each modal is far away from a slot of the metal bezel, thereby reducing electric-field load in the slot and impact of a hand on the electric field in the modal, and improving performance of the antenna.
  • the electrical length path from the feed point 10 to the second metal section 22 may be changed by changing a length of the first conductor 21, so that the electrical length path from the feed point 10 to the second metal section 22 is not equal to the electrical length path from the ground point 30 to the second metal section 22.
  • the electrical length path from the ground point 30 to the second metal section 22 may be changed by changing a length of the second conductor 23, so that the electrical length path from the ground point 30 to the second metal section 22 is not equal to the electrical length path from the feed point 10 to the second metal section 22.
  • lengths of both the first conductor 21 and the second conductor 23 may be changed, so that the electrical length path from the feed point 10 to the second metal section 22 is not equal to the electrical length path from the ground point 30 to the second metal section 22.
  • a parallel adjusting circuit 80 may be used, so that the electrical length path from the feed point 10 to the second metal section 22 is not equal to the electrical length path from the ground point 30 to the second metal section 22.
  • a series or parallel adjusting circuit 80 may be used, so that the electrical length path from the feed point 10 to the second metal section 22 is not equal to the electrical length path from the ground point 30 to the second metal section 22.
  • two slots are disposed in a metal bezel of a mobile terminal provided in this embodiment, and the two slots divide the metal bezel into three metal sections that are insulated from each other.
  • Metal sections that are located on two sides of the two slots are a first metal section 50 and a third metal section 60, and a metal section located between the two slots is a second metal section 22.
  • the second metal section 22 is a straight strip-shaped metal section.
  • An antenna of the mobile terminal includes: a radiating element 20, a matching network 40, a feed point 10, and a ground point 30.
  • the radiating element 20 includes the second metal section 22, and a first conductor 21 and a second conductor 23 that are connected to the second metal section 22.
  • the first conductor 21 is a conductor in any form, such as a straight line form or a bend line form.
  • the first conductor 21 and the second metal section 22 form a loop.
  • the first conductor 21 may be a flexible circuit board, a metal conductive plate, a laser layer, a thin-layer conductor, or the like.
  • the first conductor 21 may be in any other form that can implement an electrical connection between the feed point 10 and the second metal section 22.
  • the feed point 10 and the ground point 30 are located on one side of a central line, and the central line is a central line, perpendicular to a length direction of the second metal section 22, among central lines of the second metal section 22.
  • the mobile terminal is a mobile phone
  • a corresponding location of the central line is a location of a USB interface or a charging interface. Therefore, it may also be understood as that the feed point 10 and the ground point 30 are located on a same side of the USB interface or the charging interface.
  • an electrical length path from the feed point 10 to a middle point of the second metal section 22 is equal to an electrical length path from the ground point 30 to the middle point of the second metal section 22, the location of the feed point 10 is changed to increase a physical distance between the feed point 10 and the middle point of the second metal section 22, and the feed point 10 and the second metal section 22 are connected by using the first conductor 21.
  • a length of the first conductor 21 is increased, so that the electrical length path from the feed point 10 to the second metal section 22 is greater than the electrical length path from the ground point 30 to the second metal section 22.
  • This manner may be understood as lengths of the first conductor 21 and the second conductor 23 are changed, so that the electrical length path from the feed point 10 to the second metal section 22 is not equal to the electrical length path from the ground point 30 to the second metal section 22.
  • the feed point 10 is connected to the first conductor 21 by using the matching network 40.
  • the matching network 40 may have different matching manners including a conductor and a capacitor, such as a plurality of conductors connected in parallel, a plurality of capacitors connected in series, or a conductor and a capacitor connected in series. A specific manner may be selected based on an actual requirement.
  • the electrical length path from the feed point 10 to the middle point of the second metal section 22 may also be regulated by using the disposed matching network 40.
  • the electrical length path from the ground point 30 to the second metal section 22 is changed.
  • the ground point 30 is connected in series or in parallel to a reference element, so as to change the electrical length path from the ground point 30 to a middle point of the second metal section 22.
  • FIG. 4 shows a manner in which the ground point 30 is connected to the reference element in parallel.
  • the antenna further includes a adjusting circuit 80 located between the ground point 30 and the feed point.
  • the adjusting circuit 80 is a circuit including the reference element.
  • the adjusting circuit 80 includes a plurality of branches connected in parallel, an inductor, a capacitor, or a combination of an inductor and a capacitor is disposed on each branch, and each branch is grounded.
  • the plurality of branches are connected in parallel, one end of each of the plurality of branches is connected to the second metal section 22 in series, and the other end is grounded.
  • the second metal section 22 is selectively connected to one branch of the adjusting circuit 80.
  • one switch is disposed on each branch. The switch is controlled to be switched on or off, to implement grounding of the second metal section 22 by using a branch in which a switch is switched on.
  • a single-pole multi-throw switch may alternatively be used.
  • a non-movable end of the single-pole multi-throw switch is connected to the second metal section 22, and a movable end is connected to the branch.
  • the single-pole multi-throw switch By using the single-pole multi-throw switch, one branch is selected for grounding.
  • the matching circuit 80 is connected to the ground point 30 in parallel, the electrical length path is changed by regulating the reference element disposed on the branch, so that the electrical length path from the feed point 10 to the second metal section 22 is not equal to the electrical length path from the ground point 30 to the second metal section 22.
  • the reference element may be the inductor or a circuit of the inductor and the capacitor that are connected in series. As shown in FIG. 4 , a different inductor is disposed on each of the plurality of branches, and the inductor and the capacitor that are connected in series are disposed on at least one branch. In a structure shown in FIG. 4 , a manner in which the inductor and the capacitor are disposed in series on one circuit is used. It should be understood that the configuration manner of the inductor and the capacitor may be changed based on an actual requirement, and is not limited to the structure shown in FIG. 4 .
  • FIG. 5 shows a manner in which the ground point 30 is connected to the reference element in series.
  • the ground point 30 is connected to a plurality of branches connected in parallel, an inductor or a capacitor or a capacitor is disposed on each branch, and each branch is grounded.
  • the second metal section 22 is selectively connected to one branch of the matching circuit 80.
  • the electrical length path from the ground point 30 to the second metal section 22 is changed by connecting a plurality of branches to the ground point 30 in series.
  • the ground point 30 is first connected to the plurality of branches in parallel, and then the branch is connected to the second metal section 22.
  • the inductor and the capacitor that are connected in series are at least disposed on each branch.
  • the electrical length path from the ground point 30 to the second metal section 22 may be changed by the disposed inductor, capacitor, or a combination of the inductor and the capacitor.
  • components of different parameters are disposed on a plurality of branches, and each branch is selectively connected to the ground point 30 or the second metal section 22.
  • a switch is disposed on each branch, and the second metal section 22 is connected to the ground point 30 through one of the branches by switching on or off the switch.
  • a single-pole multi-throw switch may be alternatively used.
  • a non-movable end of the single-pole multi-throw switch is connected to the second metal section 22, and a movable end is connected to the branch.
  • the single-pole multi-throw switch By using the single-pole multi-throw switch, one branch is selected for grounding.
  • the adjusting circuit 80 is disposed on a second conductor 23. To be specific, one end of the adjusting circuit 80 is grounded and the other end is connected to the second conductor 23. The other end of the second conductor 23 is connected to the second metal section 22.
  • the reference element may be the inductor, the capacitor, or a circuit of the inductor and the capacitor that are connected in series. As shown in FIG. 5 , a different inductor is disposed on each of the plurality of branches, and the capacitor that is connected in series to the inductor is disposed on at least one branch. In a structure shown in FIG. 5 , a manner in which the inductor and the capacitor are disposed in series on one circuit is used. It should be understood that the configuration manner of the inductor and the capacitor may be changed based on an actual requirement, and is not limited to the structure shown in FIG. 5 .
  • the electrical length path from the ground point 30 to the second metal section 22 is changed by using different manners shown in FIG. 4 and FIG. 5 , thereby changing a location of a maximum electric field point.
  • the feed point 10 and the ground point 30 may be respectively located on two sides of a central line of the second metal section 22. More specifically, the feed point 10 and the ground point 30 are respectively located on the two sides of the central line of the second metal section 22 in a symmetric manner.
  • the adjusting circuit 80 may alternatively be disposed on the first conductor 21. In other words, the electrical length path from the feed point 10 to the second metal section 22 is changed by using the adjusting circuit 80.
  • Embodiment 1 and Embodiment 2 are both used.
  • both the electrical length path from the feed point 10 to the second metal section 22 and the electrical length path from the ground point 30 to the second metal section 22 are changed.
  • the reference element and lengths of the first conductor 21 and the second conductor 23 are properly designed, so that the electrical length path from the ground point 30 to the second metal section 22 is not equal to the electrical length path from the feed point 10 to the second metal section 22.
  • the antenna further includes a parasitic element in addition to the structure shown in Embodiment 3.
  • the parasitic element may include the first metal section 50 or the third metal section 60 that is grounded.
  • a resonance frequency produced by the parasitic element may be regulated by changing a location of the ground point.
  • the parasitic element may alternatively include the first metal section 50 or the third metal section 60 and a metal patch 70 that is connected to a slot endpoint (the slot endpoint is an end of the metal section that is close to a slot).
  • a resonance location of the parasitic element is determined by both the location of the ground point and a length of the metal patch 70.
  • the metal patch 70 is a flexible circuit board, a metal conductive plate, a laser layer, or a thin-layer conductor during specific preparation. As shown in FIG. 6 , in this case, the metal patch 70 is located on the first metal section 50, and is located at an end of the first metal section 50 that is close to the slot. In addition, the metal patch 70 may alternatively be disposed at an end of the third metal section 60 that is close to the slot. It should be understood that disposed locations of the feed point 10 and the ground point 30 in FIG. 6 are only a specific example, and the ground point 30 and the feed point 10 may alternatively be disposed in a manner different from that shown in FIG. 6 .
  • the bend forms a U-shape bezel with an opening, and the opening of the U-shape bezel faces toward the location of the feed point 10.
  • the parasitic element is added to a loop antenna, to improve flexibility of high-frequency tuning of the antenna. Particularly, when a wire of a metal bezel of the antenna is fixed, the parasitic element may effectively improve bandwidth and radiating efficiency of the loop antenna in intermediate and high frequencies.
  • the radiating element 20 provided in this embodiment further includes a third conductor 24, in addition to the second metal section 22, the first conductor 21, and the second conductor 23 included in the foregoing embodiments, and two ends of the third conductor 24 are connected to the first conductor 21 and the second conductor 23, respectively.
  • the first conductor 21, the second metal section 22, the second conductor 23, and the third conductor 24 form a loop.
  • a current from the feed point 10 flows through the first conductor 21 to the second metal section 22, and a current from the ground point flows through the third conductor 24 to the second metal section 22.
  • a configuration manner in this embodiment may be applied to Embodiment 1 to Embodiment 4.
  • the third conductor 23 may be added to the structure of the radiating element 20 in Embodiment 1 to Embodiment 4.
  • the third conductor 24 is a flexible circuit board, a metal conductive plate, a laser layer, or a thin-layer conductor.
  • FIG. 8a is a schematic diagram of distribution of a maximum electric-field value in a half wavelength modal in this application
  • FIG. 8b is a schematic diagram of distribution of a maximum electric-field value in one wavelength modal
  • FIG. 8c is a schematic diagram of distribution of a maximum electric-field value in a 3/2 modal
  • FIG. 8d is a schematic diagram of distribution of a maximum electric-field value in a resonant modal of a parasitic element.
  • a solid circle represents a maximum electric field point. It can be learned from FIG. 8a, FIG.
  • the mobile terminal may be a common mobile terminal device, such as a mobile phone or a tablet computer.
  • the mobile terminal device has a metal bezel, and at least two slots are disposed in the metal bezel, thereby dividing the metal bezel into a plurality of metal sections that are insulated from each other.
  • two slots are disposed in the metal bezel, and the two slots divide the metal bezel into a first metal section 50, a second metal section 22, and a third metal section 60 that are insulated from each other.
  • the mobile terminal further includes the antenna according to any one of the foregoing embodiments.
  • a connection structure between the feed point 10 or the ground point 30 and the second metal section 22 is changed, so that the electrical length path of the current from the feed point 10 to the second metal section 22 is not equal to the electrical length path of the current from the ground point 30 to the second metal section 22, and the maximum electric field point is far away from a slot of the metal bezel, thereby reducing impact of a hand on an electric field in a modal, and improving performance of the antenna.

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Claims (10)

  1. Antenne d'un terminal mobile, le terminal mobile ayant une lunette métallique, au moins deux fentes étant disposées dans la lunette métallique et les deux fentes divisant la lunette métallique en une première section métallique (50), une deuxième section métallique (22) ayant une direction longitudinale, et une troisième section métallique (60) ; et l'antenne comprenant un élément rayonnant (20), un réseau correspondant (40), un point d'alimentation (10) et un point de masse (30),
    l'élément rayonnant (20) comprenant la deuxième section métallique (22) située entre les deux fentes, un premier conducteur (21) et un deuxième conducteur (23) ; le premier conducteur (21) étant connecté à une extrémité de la deuxième section métallique (22), et un point de connexion entre le premier conducteur (21) et la deuxième section métallique (22) étant un point de contact d'alimentation (80) ; le deuxième conducteur (23) étant connecté à l'autre extrémité de la deuxième section métallique (22), et un point de connexion entre le deuxième conducteur (23) et la deuxième section métallique (22) étant un point de contact de masse (90) ; et une première distance (d) dans la direction longitudinale entre le point d'alimentation (10) et le point de masse (30) étant inférieure à une seconde distance (D) dans la direction longitudinale entre le point de contact d'alimentation (80) et le point de contact de masse (90) ;
    le point d'alimentation (10) étant connecté au premier conducteur (21) à l'aide du réseau correspondant (40) ;
    le point de masse (30) étant connecté au deuxième conducteur (23) ; et
    un trajet de longueur électrique d'un courant depuis le point d'alimentation (10) à la deuxième section métallique (22) n'étant pas égal à un trajet de longueur électrique d'un courant depuis le point de masse (30) à la deuxième section métallique (22) ;
    comprenant en outre un troisième conducteur (24), deux extrémités du troisième conducteur (24) étant respectivement connectées au premier conducteur (21) et au deuxième conducteur (23).
  2. Antenne du terminal mobile selon la revendication 1, le point d'alimentation (10) et le point de masse (30) étant situés sur un côté d'une première ligne centrale, et la première ligne centrale étant une ligne centrale, perpendiculaire à la direction longitudinale de la deuxième section métallique (22), parmi les lignes centrales de la deuxième section métallique (22).
  3. Antenne du terminal mobile selon la revendication 1 ou 2, comprenant en outre un circuit de réglage situé entre le point de masse (30) et une ligne d'alimentation, le circuit de réglage comprenant une pluralité de branches parallèles, un inducteur ou un condensateur étant disposé sur chaque branche, et chaque branche étant mise à la masse ; et la deuxième section métallique étant connecté sélectivement à une branche du circuit de réglage.
  4. Antenne du terminal mobile selon la revendication 3, un inducteur et un condensateur qui sont connectés en série étant disposés sur au moins une branche.
  5. Antenne du terminal mobile selon la revendication 3 ou 4, un circuit de réglage étant disposé dans le deuxième conducteur (23), le circuit de réglage comprenant une pluralité de branches parallèles, un inducteur ou un condensateur étant disposé sur chaque branche, et chaque branche étant connectée au point de masse (30) ; et la deuxième section métallique (22) étant connectée sélectivement à une branche du circuit de réglage.
  6. Antenne du terminal mobile selon la revendication 5, un inducteur et un condensateur qui sont connectés en série étant disposés sur au moins une branche.
  7. Antenne du terminal mobile selon l'une quelconque des revendications 1 à 6, comprenant en outre au moins un élément parasite.
  8. Antenne du terminal mobile selon la revendication 5, un élément parasite étant la première section métallique (50), ou la troisième section métallique (60), ou la première section métallique (50) et une pièce métallique (70) disposée au niveau d'un point d'extrémité de fente de la première section métallique (50), ou de la troisième section métallique (60) et une pièce métallique (70) disposée sur un point d'extrémité de fente de la troisième section métallique (60).
  9. Antenne du terminal mobile selon l'une quelconque des revendications 1 à 8, le premier conducteur (21) étant une carte de circuit imprimé souple, une plaque conductrice métallique, une couche laser ou un conducteur à couche mince.
  10. Terminal mobile, comprenant une lunette métallique, au moins deux fentes étant disposées dans la lunette métallique, et les deux fentes divisant la lunette métallique en une première section métallique (50), une deuxième section métallique (22) et une troisième section métallique (60) qui sont isolées les unes des autres ; et comprenant en outre l'antenne selon l'une quelconque des revendications 1 à 9.
EP17902339.5A 2017-03-20 2017-06-16 Antenne de terminal mobile et terminal mobile Active EP3591759B1 (fr)

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EP3591759A1 (fr) 2020-01-08
HK1252459A1 (zh) 2019-05-24
CN108713277B (zh) 2021-02-26
CN108713277A (zh) 2018-10-26
EP3591759A4 (fr) 2020-03-04
JP6945645B2 (ja) 2021-10-06
KR20190116498A (ko) 2019-10-14
AU2017405558A1 (en) 2019-10-17
US11069955B2 (en) 2021-07-20
AU2017405558B2 (en) 2020-12-03
JP2020510365A (ja) 2020-04-02
BR112019019396A2 (pt) 2020-04-14
US20200099125A1 (en) 2020-03-26
KR102208890B1 (ko) 2021-01-27
WO2018171057A1 (fr) 2018-09-27

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